Modeling and simulation of ultra wideband radar fuze receiver

A time domain mathematical model of sampling integral differential circuit is designed in this paper in order to obtain the output signal of ultra wideband (UWB) radar fuze receiver during missile target encounter and optimize the performance of receiver. Considering the time domain Doppler effect of carrier-free signal, a time domain simulation method for the receiver output signal is proposed. The receiver output signals with different missile-target closing velocities have been simulated. The simulation results show that the frequencies of output signal vary proportionately with the missile-target approaching velocities; the relation curve of the amplitude of output signal and missile-target approaching velocity has a stationary point. Suitable velocity stationary point can be set by selecting proper integration capacitance and differential capacitance to improve the anti-jamming performance of fuze.